code: def __repr__(self):
      return "_DummyClass(%f, %f)" % self.value
  
file_path: mars/mars/core/tests/test_entrypoints.py
imports: import sys
  import types
  import warnings
  import pkg_resources
label_desc: Use image node_id 2 for calling the _DummyClass obj's underlying member method code with example usage: obj.__repr__() and returns: unknown